EP 3218530 A1 20170920 - METHOD AND FACILITY FOR CARBONITRIDING ONE OR MORE STEEL PARTS UNDER LOW PRESSURE AND AT A HIGH TEMPERATURE
Title (en)
METHOD AND FACILITY FOR CARBONITRIDING ONE OR MORE STEEL PARTS UNDER LOW PRESSURE AND AT A HIGH TEMPERATURE
Title (de)
VERFAHREN UND ANLAGE ZUR KARBONITRIERUNG EINER ODER MEHRERER STAHLTEILE UNTER NIEDRIGEM DRUCK UND BEI HOHER TEMPERATUR
Title (fr)
PROCÉDÉ ET INSTALLATION DE CARBONITRURATION DE PIÈCE(S) EN ACIER SOUS BASSE PRESSION ET HAUTE TEMPÉRATURE
Publication
Application
Priority
- FR 1460975 A 20141114
- FR 2015052742 W 20151012
Abstract (en)
[origin: WO2016075377A1] The invention relates to a carbonitriding facility (IC) which includes: a heating chamber (CC), for heating at least one steel part (PA) to a first temperature, in the presence of a neutral gas and under a selected pressure; a first enriching chamber (CE1) for enriching the heated part with nitrogen, by nitriding same in α-phase at a second temperature no higher than the first temperature; a second enriching chamber (CE2) for enriching the nitrogen-enriched part with carbon, by carburising same at a third temperature higher than the second temperature; a quench chamber (CT) for quenching the nitrogen- and carbon-enriched part under pressure; a transfer airlock (ST) communicating with the chambers and suitable for temporarily receiving the part in a controlled atmosphere; and transfer means (MT) for transferring the part from one chamber to another chamber via the transfer airlock (ST).
IPC 8 full level
C23C 8/02 (2006.01); C21D 1/74 (2006.01); C21D 9/00 (2006.01); C23C 8/34 (2006.01); C23C 8/80 (2006.01); F27B 9/02 (2006.01)
CPC (source: CN EP US)
C21D 1/74 (2013.01 - EP US); C21D 9/0062 (2013.01 - EP US); C23C 8/02 (2013.01 - EP US); C23C 8/32 (2013.01 - CN); C23C 8/34 (2013.01 - EP US); C23C 8/80 (2013.01 - EP US); F27B 5/04 (2013.01 - EP); F27B 19/02 (2013.01 - EP); F27D 3/04 (2013.01 - EP); C21D 1/06 (2013.01 - EP US)
Citation (search report)
See references of WO 2016075377A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2016075377 A1 20160519; CN 107109616 A 20170829; CN 107109616 B 20200414; EP 3218530 A1 20170920; EP 3218530 B1 20200513; FR 3028530 A1 20160520; FR 3028530 B1 20201023; JP 2017535671 A 20171130; JP 7092500 B2 20220628; US 11512381 B2 20221129; US 2018363123 A1 20181220
DOCDB simple family (application)
FR 2015052742 W 20151012; CN 201580061659 A 20151012; EP 15805560 A 20151012; FR 1460975 A 20141114; JP 2017525942 A 20151012; US 201515526272 A 20151012